(19)

(11)

EP 1 584 158 A1

(12)

(43) Date of publication: 12.10.2005 Bulletin 2005/41 (21) Application number: 03782729.2 (22) Date of filing: 29.12.2003

(51) International Patent Classification (IPC)7: H04L 12/24 (86) International application number: PCT/GB2003/005705 (87) International publication number: WO 2004/064323 (29.07.2004 Gazette 2004/31)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 09.01.2003 GB 0300499 (71) Applicant: SATCHWELL CONTROL SYSTEMS LIMITED London SW1P 1BX (GB)	(72) Inventor: HUSEIN, Sajed,c/o Satchwell Control Systems Ltd. London SW1P 1BX (GB) (74) Representative: Gymer, Keith Francis et al Page Hargrave, Southgate, Whitefriars Lewins Mead, Bristol BS1 2NT Bristol BS1 2NT (GB)